Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

Two resistors X and Y with 2 Ω and 3 Ω resistances respectively are first connected parallelly and then in series. If voltage supplied is 5V, then:

(i) Draw the circuit diagram in order to depict the combination of resistors:

Resistance

Resistance

(ii) Estimate voltage across the 3 Ω resistor in the series combination of resistors.

Resistance of X = R₁ = 2Ω
Resistance of Y = R₂ = 3Ω
Voltage, V = 6V

In order to find the voltage across a 3Ω resistor in the series combination of resistors, we have to

We are already aware that the equivalent resistance (total resistance) in a series combination can be expressed as:

R_eq = R₁+ R₂

Now, after replacing the values of R₁ and R₂ we will get:

⇒ R_eq= 2 + 3

⇒ R_eq = 5Ω

We know that current can be expressed as:

I = V/R

Here, I = V/R_eq

So, inserting the given values, we will get:

I = 55

I = 1A

Therefore, the current passing through the circuit is 1A.

Now, in order to find the voltage present across 3Ω resistors, we can also use the formula of voltage:

V = I × R

Now, after placing the required values, we get:

⇒ V = 1 × 3

⇒ V = 3V

Hence, the voltage across the 3Ω resistor is 3 Volts.

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Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

CBSE CLASS XII Related Questions

1.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

4.
Two copper wires having their radii in the ratio of 3 : 2 are connected in series across a battery. Find the ratio of the drift velocities of the electrons in the wires.

5.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

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Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

CBSE CLASS XII Related Questions

1.This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

4.Two copper wires having their radii in the ratio of 3 : 2 are connected in series across a battery. Find the ratio of the drift velocities of the electrons in the wires.

5.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

4.
Two copper wires having their radii in the ratio of 3 : 2 are connected in series across a battery. Find the ratio of the drift velocities of the electrons in the wires.

5.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?